Simplifying algebraic expressions1-10

Kathryn bought 2.5 pounds of grapes at the Farmers Market. She paid 1.26 per pound. How much money did Kathryn spend in all?

1/2 X plus X - 15+1/2 X + 100 + X - 25 equals 540

A fish tank is 2 metres long, 50 centimetres wide and 20 centimetres high. How many litres of water will it hold if it is filled to the top?

A scientist calculated the mean and standard deviation of a data set to be Mu = 120 and Sigma = 9. She then found that she was missing one data value from the set.

The integers form 1 to 100 are randomly separated into two groups of 50 integers each. what is the probability that 37 and 89 are in the same group

A fisherman is setting up a net 6 feet below the surface of the water. Each foot of the water screens out 40% of the light coming from the surface.

1.5x-6.5 for x=9 what is the value given for x

The speed of train a is 6 mph slower than the speed of trainb. train a travels 200 miles in the same time it takes train b to travel 230 miles. find the speed of each train.

The equation of a circle is given below. (x + 7) + (y + 8) = 4/9 What is its center? What is its radius? If necessary, round your answer to two decimal places, units Show Calculator

45 cm is equivalent to how many inches